[Matplotlib-users] import matplotlib.pyplot does not work

[pymilo <cam...@gm...>]

Hello everyone,

I want to work whit matplotlib and I installed it using pip command.
Apparently the installation was successful and when I open ipython and
import matplotlib everything works well. Nevertheless when I try to import
pyplot using: import matplotlib.pyplot I obtain this:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-11-6f467123fe04> in <module>()
----> 1 import matplotlib.pyplot

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pyplot.py
in <module>()
     22 
     23 import matplotlib
---> 24 import matplotlib.colorbar
     25 from matplotlib import _pylab_helpers, interactive
     26 from matplotlib.cbook import dedent, silent_list, is_string_like,
is_numlike
.
.
.
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/mathtext.py
in <module>()
     60 
     61 import matplotlib.colors as mcolors
---> 62 import matplotlib._png as _png
     63 ####################
     64 

ImportError:
dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/_png.so,
2): Symbol not found: _png_set_longjmp_fn
  Referenced from:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/_png.so
  Expected in: flat namespace
 in
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/_png.so
---------------------------------------------------------------------------

I have installed the libpng library as was suggested in other post but
nothing worked. I am working with a Mac OS X 10.7.5 and I have installed the
XQuartz 2.7.4. I really do not have a clue about what is happening with
that, I would appreciate so much if you can help me figure this problem out.


All the best!
Milo.






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